b'Insulate the CavitiesRemove Trim and WallboardPiece to Gain AccessThere are a number of choices to insulate inside the cavitiesbetween the old window frame and the rough framing. Spray PU Foam is the easiest because it doesnt require fullremoval of the trim if the nozzle can be inserted into the gap. Be sure to use a PU Foam that has been tested in accordancewith AAMA 812 for low pressure development, to avoid impart-ing pressure towindow frame that may void window warranty.Foam insulation board and fiberglass batts are not effective airseal material between the window and rough opening. Foamboards need to be cut precisely and do not create a seal withoutMake a Small caulking. Fiberglass insulation is also not effective as it does notAccess Hole create a seal and may absorb and retain moisture creating anenvironment for mold and mildew. Compressed foam tape con-forms to the contours between the RO and the new window andare typically installed more commercial applications.Finally, Air Seal along interior using a quality low odor,paintable latex sealant to eliminate air infiltration and soundintrusion.Thermal Images of fullyinsulated and air-sealedgaps, using any of a varietyof material choices, demonstrate that the totalopening will block air infiltration and heat loss as well as the new window.Window Fitters Guide to Window Installation142020 AWDI, LLC Do not reproduce without permission'